Field of structures to create BO WebIntelligence report

Hello friends, greetings to all. I write here because I have a great doubt about MM fields that come in transaction ME2L.I am developing a report in WebIntelligence and I am taking the fields that are presented to me when running the transaction. My problem is that there are some fields that are determined from structures that are created in standard programs. In my case to elaborate my DB, I had to generate some infosets from the ERP (SQ02), to manage them in the IDT (Information Design Tool) because in BO can not be used structures to take the fields. I hope someone can explain how to generate the fields or calculations for use in the report and generate it. I'll comment the fields below:

Hi Tammy, thanks for your answer. I created the universe, using the tables (EKET, EKKO, EKPO, EBAN, EKBE, T163Y) of the transaction. The problem is that the comented fields are only availables from structures and i don't have idea what must look to recreate the calculations.

One PO item can have a single or several receipts till it is fulfilled, same for invoices. A structure is used because this information is calculated by an ABAP logic during runtime of the report. Based on the order quantity and value from EKPO table minus the already received quantities and values (considering also cancellations) from one or more entries in table EKBE. Also considered will be the complete delivery indicator which can be set automatically if the received quantity is in the delivery tolerances or it can be set manually before the ordered quantity is reached. But once it is set it is completed even the ordered quantity is not reached.